WebGLRenderingContext: uniform[1234][fi][v]() method

{{APIRef("WebGL")}} {{AvailableInWorkers}} 

The WebGLRenderingContext.uniform[1234][fi][v]() methods of the WebGL API specify values of uniform variables. All active uniform variables defined in a program object are initialized to 0 when the program object is linked successfully. They retain the values assigned to them by a call to this method until the next successful link operation occurs on the program object, when they are once again initialized to 0.

[!NOTE] Many of the functions described here have expanded WebGL 2 interfaces, which can be found under WebGL2RenderingContext.uniform[1234][uif][v]().

Syntax

uniform1f(location, v0)
uniform1fv(location, value)
uniform1i(location, v0)
uniform1iv(location, value)

uniform2f(location, v0, v1)
uniform2fv(location, value)
uniform2i(location, v0, v1)
uniform2iv(location, value)

uniform3f(location, v0, v1, v2)
uniform3fv(location, value)
uniform3i(location, v0, v1, v2)
uniform3iv(location, value)

uniform4f(location, v0, v1, v2, v3)
uniform4fv(location, value)
uniform4i(location, v0, v1, v2, v3)
uniform4iv(location, value)

Parameters

• location

  • : A {{domxref("WebGLUniformLocation")}}  object containing the location of the uniform attribute to modify.

• value, v0, v1, v2, v3

  • : A new value to be used for the uniform variable. Possible types:

    • A floating point {{jsxref("Number")}}  for floating point values (methods with “f”).
    • A sequence of floating point numbers (for example a {{jsxref("Float32Array")}}  or an {{jsxref("Array")}}  of numbers) for floating point vector methods (methods with “fv”).
    • An integer {{jsxref("Number")}}  for integer values (methods with “i”).
    • An {{jsxref("Int32Array")}}  for integer vector methods (methods with “iv”).

Return value

None ({{jsxref("undefined")}} ).

Examples

gl.uniform1f(u_alpha, 0.8);

Specifications

{{Specifications}} 

Browser compatibility

{{Compat}} 

See also

• {{domxref("WebGLRenderingContext.uniformMatrix()")}}